PayPal is excellent for sending money (buying) for the same reason it is terrible for receiving money (selling). Essentially, the buyer is always right, and so

PayPal is excellent for sending money (buying) for the same reason it is terrible for receiving money (selling). Essentially, the buyer is always right, and so, as a buyer, it is very easy to get your money back in case of a problem. The seller is the one who gets all the fees, and needs to justify himself if there is a dispute. Sellers offer PayPal because even though it is really bad for them, it gets them customers.